Random.extend

Random.extend({
    constellations: ['白羊座', '金牛座', '双子座', '巨蟹座', '狮子座', '处女座', '天秤座', '天蝎座', '射手座', '摩羯座', '水瓶座', '双鱼座'],
    constellation: function(date){
        return this.pick(this.constellations)
    }
})
Random.constellation()
// => "水瓶座"
Mock.mock('@CONSTELLATION')
// => "天蝎座"
Mock.mock({ constellation: '@CONSTELLATION'})
// => { constellation: "射手座" }